计算机专业英语Unit03_SectionA_Proagramming_Language.pptVIP

* Hierarchy: 抽象的层次，等级制度，上下级之间的控制与被控制。 Layer: a level of material, 实际的层，如层状的蛋糕 layer cake。 * Deduce: to work out from facts that one knows or guesses. 根据已知的或一些不确定的知识所推导出来的结论。 From the height of the sun I deduced that it was about ten. * Purpose: 意图，目的；On purpose: 故意地；aim at doing sth。 * Macro: [‘ma:kro] 指令，嵌入在一个大程序中的小程序。 * Type定义了三方面的内容：变量可以存储何种形式的数据；这些数据的数值精度；变量如何存储一系列数值的集合，比如用表还是数组。 A collection of values: 一组数据（没有先后），有序列的时候用a sequence of Organized fashion: organize v. 组织，安排；organized adj. 安排有序的，有条理的。 * Pointer: a pointer is something that is used for pointing at things, 用来指示物体，比如路标。在这里，翻译作指针。 That is: in other words, 也就是说 * 加减乘除：addition, subtraction, multiplication, division. * Define sth as sth: 将。。。定义为。。。 * 宏一般不能独立执行，必须依托于某个大程序，所以它是代码片段(segment)，而不是完整的语句块(block) * Date back to: 追溯，be tracked back to, Introduction: 介绍；引进，引入。 Emerge: 出现，浮现。To appear by coming out of something or our from behind something. 被知晓，to become known。 * 1950表示确切的年份，1950s表示特定的年代 Late: 晚期 Early: 早期 * Heavy: 沉重的 Heavily: 沉重的，大量的，heavy rain，大雨。 * Decline: 下降，它表示了一种缓慢下降变得衰弱的过程 popularity: n.， 流行； popular adj.，流行的。 Vitally: */47 Programming Language － Classification of High-Level Languages Classes of objects can also be further grouped into hierarchies, in which objects of one class can inherit methods from another class. The structure provided in object-oriented languages makes them very useful for complicated programming tasks. 对象的类也可进一步组合成层，而在层中一个类的对象可继承另一个类的方法。面向对象语言提供的这种结构，使该语言对于复杂的编程任务非常有用。 */47 Programming Language － Classification of High-Level Languages Logic languages use logic as their mathematical base. A logic program consists of sets of facts and if-then rules, which specify how one set of facts may be deduced from others, for example: If the statement X is true, then the statement Y is false. 逻辑语言将逻辑用作其数学基础。逻辑程序由事实组和“如果―则”规则构成，“如果―则”规则具体说明一组事实如何可以从其他事实组中推断出来，例如： 如果X语句为真，则Y语句为假。 */47 Programming Language －Classification of High-Level Languages In the execution of such a progr